<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <!-- 引入 lib 目录下的 bootstrap 样式表 -->
  <link rel="stylesheet" href="./lib/bootstrap-v4.6.0.css">
  <style>
    :root {
      font-size: 15px;
    }

    body {
      padding-top: 15px;
    }
  </style>
</head>

<body>

  <!-- 栅格系统 -->
  <div class="container-fluid">
    <!-- 栅格系统中的一行 -->
    <div class="row">
      <!-- 左侧的表格，占了 8 列 -->
      <div class="col-sm-8">
        <table class="table table-bordered table-striped table-dark table-hover text-center">
          <thead>
            <!-- 表头行 -->
            <tr>
              <th scope="col">Id</th>
              <th scope="col">书名</th>
              <th scope="col">作者</th>
              <th scope="col">出版社</th>
              <th scope="col">操作</th>
            </tr>
          </thead>
          <tbody>
            <!-- 表格中的每一行 -->
            <tr>
              <th scope="row">xxx</th>
              <td>xxx</td>
              <td>xxx</td>
              <td>xxx</td>
              <td>
                <button type="button" class="btn btn-link btn-sm">删除</button>
              </td>
            </tr>
          </tbody>
        </table>
      </div>

      <!-- 右侧的添加区域，占了 4 列 -->
      <div class="col-sm-4">
        <!-- 添加图书的卡片 -->
        <div class="card text-white bg-secondary sticky-top">
          <div class="card-header">添加新图书</div>
          <form class="card-body bg-light" id="addForm">
            <!-- 书名 -->
            <div class="input-group mb-3">
              <div class="input-group-prepend">
                <span class="input-group-text">书名</span>
              </div>
              <input type="text" class="form-control" placeholder="请输入图书名称" name="bookname">
            </div>
            <!-- 作者 -->
            <div class="input-group mb-3">
              <div class="input-group-prepend">
                <span class="input-group-text">作者</span>
              </div>
              <input type="text" class="form-control" placeholder="请输入作者名字" name="author">
            </div>
            <!-- 出版社 -->
            <div class="input-group mb-3">
              <div class="input-group-prepend">
                <span class="input-group-text">出版社</span>
              </div>
              <input type="text" class="form-control" placeholder="请输入出版社名称" name="publisher">
            </div>
            <!-- 添加按钮 -->
            <button class="btn btn-dark" type="submit">添加</button>
          </form>
        </div>
      </div>
    </div>
  </div>

  <script src="./lib/axios.js"></script>
  <script src="./lib/form-serialize.js"></script>
  <script>
    // 配置全局根路径
    axios.defaults.baseURL = 'http://www.liulongbin.top:3006'

    let tbody = document.querySelector('tbody')
    let form = document.querySelector('form')

    // 1、请求后台数据，渲染数据
    render()

    // 2、添加数据
    form.addEventListener('submit', function (e) {
      // 阻止默认行为
      e.preventDefault()

      // 获取表单数据
      let result = serialize(form, { hash: true })

      axios.post('/api/addbook', result).then(({ data: res }) => {
        console.log(res)

        if (res.status === 201) {
          // 如果成功，重新渲染
          render()
          // 重置数据
          form.reset()
        } else {
          alert(res.msg)
        }
      })
    })

    // 3、删除功能——》事件委托
    tbody.addEventListener('click', function (e) {
      console.log(e.target.tagName)

      if (e.target.tagName === 'BUTTON') {
        console.log('要删除了')
        //  删除当前数据，并且重新渲染
        console.log(e.target.dataset.id)
        axios.delete('/api/delbook', {
          params: {
            id: e.target.dataset.id
          }
        }).then(({ data: res }) => {
          // 重新渲染
          render()
        })
      }
    })

    // 获取后台数据，渲染数据
    function render() {
      let htmlStr = ''
      //  请求数据
      axios.get('/api/getbooks').then(({ data: res }) => {
        console.log(res)
        // 渲染数据
        res.data.forEach(item => {
          htmlStr += `
          <tr>
            <th scope="row">${item.id}</th>
            <td>${item.bookname}</td>
            <td>${item.author}</td>
            <td>${item.publisher}</td>
            <td>
              <button type="button" class="btn btn-link btn-sm" data-id='${item.id}'>删除</button>
            </td>
          </tr>
          `
        })

        // 把htmlStr渲染到网页中去
        tbody.innerHTML = htmlStr
      })
    }
  </script>
</body>

</html>